Automatic fire-extinguishing apparatus



(N0 ModeL) O. B. HALL.

AUTOMATIC FIRE EXTINGUISHING APPARATUS.

PatentedOot. 6, 1885 N. PETERS, Phowumu m her, WashingioJL DJ;

UNITED STATES PATENT ()FFIcE.

OSBORN B. HALL, OF MALDEN, ASSIGNOR OF ONE-HALF TO CALEB O. WALIVORTH, OF BOSTON, MASSACHUSETTS.

AUTOMATIC FIRE-EXTINGUISHING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 327,876, dated October 6, 1885.

Application filed April 17, 1885. Serial No. 162,525.

To aZZ whom it may concern:

Be it known that I, OSBORN B. HALL, of Maiden, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Automatic Fire-Extinguishing Apparatus, which will, in connection with the accompanying drawings, be here inafter fully described and specifically defined in the appended claims.

This invention has for its object an improvement in that class of fire-extinguishing apparatus for which Letters Patent of the United States, No. 296,490, were issued to Caleb O.Walworth and myself on the 8th day of April, 1884, and it will, in connection with the accompanying drawings, be hereinafter fully described and particularly claimed.

In said drawings, Figure 1 is a sectional elevation of an apparatus embodying my invention, as when the stop-valve is closed and the alarm is quiescent. Fig. 2 is a view like Fig. 1, except that the alarm-actuating device is shown as in contact therewith.

In said views, A represents the main or service pipe through which the water is supplied to a system of distributing-pipes, as at B, upon which are arranged a series of automatic extinguishers, as at C. \Vater is shut off in pipe A by valve a, the stem 1) of which is connected with the valve-weighting lever c.

D represents a tank filled with water to d, and E an inverted air-tank, dip-sealed in D, a pipe, 6, leading from the airspace in E to one of the distributing-pipes B, with which it is connected, so that when an extinguisher G is liberated by heat, the air in E will escape into B, thereby allowing E to fall.

For the purpose of raising valve to, I employ a cord, f, attached to tank E and passing over trucks 9, and thence down through valve- ]ever 0, and sustaining weight h,which serves to both keep the cord in a right line and to engage and raise lever c and the valve when the tank falls. I also arrange another cord, 2', with a weight, m, to rest on tank E when raised, and I carry said cord over pulley j, and thence down through arm Z of alarm F, and lapply to said cord the lesser weight k to hold the cord straight, and to engage arm Z when (No model.)

tank E falls, so as to set the alarm in motion by the superior weight m as soon as the fall of the tank leaves it suspended by the cord. As weight 70 on cord 1' is arranged to be at a less distance below arm I of alarm F when ball m rests on the tank than is weight h below arm 0 of stop-valve a, therefore when tank E falls from any cause the alarm will be reudered operative before the valve is opened, and hence if tank E should fall, as will occur from slow escape of the air therein, without the opening of an extinguisher, 0, those in charge will have ample time to replenish the sustaining air in the tank before water is admitted to pipes B by the rising of valve a.

As the said former patent shows a means of supplying air within the tank, I have not deemed it necessary to repeat the same in the present drawings, especially as my 1nvention in no respect relates thereto, but only to the means by which the alarm is rendered operative independently of and before the opening of the water-excluding valve.

I claim as my invention 1. The combination of supply-pipe A, distributing-pipes B, extinguishers C, tanks D E,valve a, and lever c, alarm F, and cordsfz', the one doubleweighted connected to the alarm at one end and the other end supported by tank E, and respectively connected with said valve-lever and the alarm, and adapted as the tank falls to first render the alarm operative and then to open the valve, substantially as specified.

2. The combination, with tank E and an operative alarm, of cord 1', duly supported above the tank and connected with said alarm, and provided with a lesser weight below the alarm, and also connected with a superior weight at the opposite end adjusted to rest upon and move with the tank, until by the falling of the latter the alarm is rendered operative by the action of the cord and its weights, substantially as specified.

()SBORN B. HALL.

Witnesses:

T. W. PORTER, EUGENE HUMPHREY. 

